Wavelength Converters
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. An efficient routing scheme to reduce packet loss in all optical networks
Optical burst switching (OBS) is a promising technology for the next generation optical Internet. A buffer-less OBS network can be implemented using ordinary optical communication equipment without the need for either wavelength converters or optical memories. However, OBS networks suffer from a relatively high blocking probability, a primary metric of inter
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2010-12
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2. AnÃlise experimental da degradaÃÃo imposta por sistemas Ãpticos a aplicaÃÃes IP / Experimental analysis of the degradation imposed by optical systems on IP
The objective of this work is to experimentally evaluate how physical impairments on the network can affect the performance of IP applications. Especially This work encompasses the analysis of the cross-layer effect caused by all-optical wavelength converters in the video signal. For this purpose, it was evaluated the packet error rate degradationcaused by p
Publicado em: 2010
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3. Guias de onda poliméricos para sensoriamento óptico e conversão de comprimento de onda / Polymeric based waveguides for optical biosensor and wavelength conversion
Um Luminescent Solar Concentrators (LSC) é basicamente uma base plástica transparente ou vidro contendo centros luminescentes.Enquanto o recente avanço dos conversores de comprimento de onda tenha aberto novas possibilidades para o desenvolvimento de células solares mais eficientes, estes também abriram novas frentes de pesquisa.Uma destas frentes envol
Publicado em: 2010
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4. USE OF ELECTRONIC CONVERTERS TO SUPPLY OF HIGH BRIGHTNESS LEDS WITH APPLICATION IN HUMAN TISSUE AND THEIR INTERACTION THERAPY / UTILIZAÇÃO DE CONVERSORES ELETRÔNICOS QUE ALIMENTAM LEDS DE ALTO BRILHO NA APLICAÇÃO EM TECIDO HUMANO E SUA INTERAÇÃO TERAPÊUTICA
This paper presents a study on the application of high-brightness LED (Light Emitting Diode)to health care. The LEDs are supplied by electronic converters, proposed in order to analyze the light emitted by the LEDs and their interaction with human tissues. Throughout the work, a comparative study between the LED and LASER and their actions on human tissue is
Publicado em: 2009
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5. Contribuições para a análise e simulação de redes ópticas: aspectos de Engenharia de Tráfego, restauração dinâmica e conversão de comprimentos de onda / Contributions for the analysis and simulation of optical networks: aspects of traffic engineering, dynamic restoration and conversion of wavelenghts
The Wavelength Division Multiplexing (WDM) technology as well as both the introduction of all optical OXCs (Optical Cross Connect) and OADMs (Optical Add/Drop Multiplexer) may provide the optical network with the networking function, i.e, the capacity to manipulate wavelengths in order to implement their routing. This possibility implies a new type of relati
Publicado em: 2009
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6. Ultrafast electrooptical switching and regenerative conversion using semiconductor optical amplifiers / Chaveamento eletro-optico ultrarrapido e conversão regenerativa utilizando amplificadores opticos a semicondutor
Electrooptical switches, optical regenerators, and wavelength converters are relevant devices for the operation of future optical networks. In this work, measurements and simulations of an electrooptical switching time reduction technique based on multipulse current injection in semiconductor optical ampli.ers (SOA) are presented. Using the simulation result
Publicado em: 2009
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7. Chaveamento eletro-optico ultrarrapido e conversão regenerativa utilizando amplificadores opticos a semicondutor / Ultrafast electrooptical switching and regenerative conversion using semiconductor optical amplifiers
Electrooptical switches, optical regenerators, and wavelength converters are relevant devices for the operation of future optical networks. In this work, measurements and simulations of an electrooptical switching time reduction technique based on multipulse current injection in semiconductor optical ampli.ers (SOA) are presented. Using the simulation result
Publicado em: 2009
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8. Desenvolvimento de gerência SNMP para dispositivos de redes totalmente ópticas. / Development of SNMP management for all network optical devices.
Optical wavelength converters (OWC) are devices that can reduce congestion and improve the efficiency of the next generation of wavelength division multiplexing (WDM) optical networks. Currently, our research group is developing a prototype of this converter in the Kyatera Project funded by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP). I
Publicado em: 2007
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9. Amplificadores Ãpticos, estudos de polarizaÃÃo e geraÃÃo de pulso usando processos paramÃtricos em fibras Ãpticas
The recent telecommunication development can be, to a large extent, attributed to the capacity of transmitting information (video, sound and data) at high transmission rates (Tbits/s) through the optical fiber. The constant advances in the technological development of active and passive devices based on optical fibers have enabled a steady increase in commun
Publicado em: 2007
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10. Medição e simulação de conversor em comprimento de onda com amplificador optico a semicondutor / Measurements and simulations of wavelenght converter based on semiconductor optical amplifier
The use of wavelenght-division multiplex (WDM) optical networks is a solution for the data-rate increasing in telecommunications systems. For a good performance of such networks, the use of wavelength converter based on semiconductor optical amplifier is important, since this one allows all-optical signal processing, as well as more flexibility in the spectr
Publicado em: 2006
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11. ALLOCATION OF WAVELENGTH CONVERTERS IN PARTIAL NETWORKS / ALOCAÇÃO DE CONVERSORES DE COMPRIMENTO DE ONDA EM REDES PARCIAIS
Este trabalho investiga o problema de alocação sub-óptima de conversores de comprimento de onda em nós de redes ópticas parciais, através da proposição de 3 algoritmos baseados nas metaheurísticas GA (Algoritmo Genético), PSO (Optimização por Enxame de Partícula) e SA (Recozimento Simulado). Simulações são apresentadas para ratificar os benef
Publicado em: 2006
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12. ALOCAÇÃO DE CONVERSORES DE COMPRIMENTO DE ONDA EM REDES ÓPTICAS / WAVELENGTH CONVERTER PLACEMENT IN OPTICAL NETWORKS
This work studies the effect of wavelength converters at nodes of wavelength division multiplexed all-optical networks. Simulations were performed to study the benefit of wavelength converters on network architectures. Moreover, wavelength converter placement heuristics based on the utilization of these devices are proposed. The performances of the heuristic
Publicado em: 2005